He never talked about himself as an object of pity, _____ any envy of the more fortunate or successful.

— I hear that Tom can’t afford his schooling this fall. — _____, let’s do something for him.

The waste water, when _______，should be clean enough to meet standards.

While ____ the dog, you should take care not to get loose . Otherwise, it may be dangerous to strangers.

_________ you take an active part in physical activity ______ be able to keep fit and stay healthy.